I have one of these delightful 'luggable' test
sets, complete with the EMX panel and Varley (one
day the grandchildren will ask me what the funny
big dial with a ring of holes in it is for).
But rotary dialling notwithstanding, the time has
come: either it's fitted into a proper 19"
enclosure or it goes - it's just too awkward to
use in its half-a-suitcase form any more.
But before I do that, I want it to stay safe
whilst I construct something to fit it into, so I
started looking for some screws to fit the rack
ears (in the suitcase).
"Hmm... I thought they were normally M5 or M6...
gotta be M4 then, shirley..."
Nope, although probably made some time around
1985, the wretched thing is threaded to 4BA. I
only had three (not four) suitable machine screws,
but they will serve for now.
To be fair, it's the suitcase that's the issue,
not the rackable bits themselves, so it's only
temporarily annoying.
But at what point was E.D. supposed to have gone
metric? I thought it was back in the 1970s.
I can't remember when I bought something new with
4BA (or any BA) threads - probably as a teenager
around 1976...
S.
In article <sgvntc$g38$1@dont-email.me>,
SimonM <somewhere@large.in.the.world> wrote:
I have one of these delightful 'luggable' test
sets, complete with the EMX panel and Varley (one
day the grandchildren will ask me what the funny
big dial with a ring of holes in it is for).
But rotary dialling notwithstanding, the time has
come: either it's fitted into a proper 19"
enclosure or it goes - it's just too awkward to
use in its half-a-suitcase form any more.
But before I do that, I want it to stay safe
whilst I construct something to fit it into, so I
started looking for some screws to fit the rack
ears (in the suitcase).
"Hmm... I thought they were normally M5 or M6...
gotta be M4 then, shirley..."
Nope, although probably made some time around
1985, the wretched thing is threaded to 4BA. I
only had three (not four) suitable machine screws,
but they will serve for now.
To be fair, it's the suitcase that's the issue,
not the rackable bits themselves, so it's only
temporarily annoying.
But at what point was E.D. supposed to have gone
metric? I thought it was back in the 1970s.
My BBC Metric Pocket Book was published in 1977.
I can't remember when I bought something new with
4BA (or any BA) threads - probably as a teenager
around 1976...
S.
Bay screws were 2BA - 4BA was for light switches.
I have one of these delightful 'luggable' test
sets, complete with the EMX panel and Varley (one
day the grandchildren will ask me what the funny
big dial with a ring of holes in it is for).
I have one of these delightful 'luggable' test sets, complete with the EMX >panel and Varley (one day the grandchildren will ask me what the funny big >dial with a ring of holes in it is for).
But rotary dialling notwithstanding, the time has come: either it's fitted into a proper 19" enclosure or it goes - it's just too awkward to use in
its half-a-suitcase form any more.
But before I do that, I want it to stay safe whilst I construct something
to fit it into, so I started looking for some screws to fit the rack ears
(in the suitcase).
"Hmm... I thought they were normally M5 or M6... gotta be M4 then, shirley..."
Nope, although probably made some time around 1985, the wretched thing is threaded to 4BA. I only had three (not four) suitable machine screws, but they will serve for now.
To be fair, it's the suitcase that's the issue, not the rackable bits themselves, so it's only temporarily annoying.
But at what point was E.D. supposed to have gone metric? I thought it was back in the 1970s.
I can't remember when I bought something new with 4BA (or any BA)
threads - probably as a teenager around 1976...
S.
Correction: just looked: Bay screws were 0BAI can't remember when I bought something new withBay screws were 2BA - 4BA was for light switches.
4BA (or any BA) threads - probably as a teenager
around 1976...
S.
PS I've quite a few BA screws - I could post some if needed.-
-- from KT24 in Surrey, England "I'd rather die of
exhaustion than die of boredom" Thomas Carlyle
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